PAPILIO III., IV., V. 



.and two sub-dorsals behind of siune size, each of the last with lilac spot ; on 1) to 

 12 are two sub-dorsal lilac spots ; head as at last previous stage. In a few hours 

 the patch is tinted with red. (Fig. d, III.) Duration of this stage about four 

 days. 



After third uioult : length at twelve hours .G to.li2iuch; anterior seo-nients 

 thickened ; color in most cases dark brown, more or less mottled with lighter 

 brown, the segments after 8 darkest ; others have the anterior segments green, 

 more or less soiled with brown, the posterior as first described ; and others still 

 are clear green anteriorly, the last segments brown mottled with green, espe- 

 cially on dorsum, the lower part of side whitish-green ; the patch salmon, and 

 extending nearly to base, but in some examples the red is overlaid, especially on 

 dorsum, with pale green ; 2 has the front ridge arched as before, the processes 

 reduced ; on 4 now appears a sub-oval greenish-yellow patch, the larger end 

 outward, edged by a fine black line ; inside, a heavy black ring, with an inner 

 spot of lilac, and on dorsal side of tlie ring a Ijlack bar ; next the patch is a 

 sub-dorsal lilac spot, rounded or qua(h-angular, often disconnected (as in lower 

 Fig. /r, XIII.); at this period these patches are separated across dorsum by a 

 space varying from .12 to .15 inch (these are the extremes in 37 examples); on 

 5 are four equal lilac spots in line across posterior edge, two sub-dorsal, two 

 lateral ; 9, 10, 11 have each four such spots; some larva? have a pair of minute 

 sub-dorsals on 12, others have four also on 7, and none on dorsum of 8 ; from 6 

 to 12 a lilac spot on each segment, below spiracles ; at either end of the ridge 

 on lo a low cone, and traces of a similar pair on 12, scarcely more than a slight 

 elevation of the skin; head brown, pink tinted. (Fig. d-, III., /<, /r, XIII.) As 

 the sta"-e proo-resses, the y-reener larvae become uni-colored, and the darker 

 become more green, but in the latter more or less brown remains to tlie and ; 

 in some cases the salmon patch becomes wholly changed to green and is lost, 

 in others its position is indicated by a paler shade of green, and often a little 

 salmon at the edges on dorsum ; the posterior edge of 5 becomes yellowish, 

 and on the front of 6 is a black transverse band, concealed when the larva is 

 at rest. (Fig. e. III.) Duration of this stage four to seven days. 



After fourth moult : at twelve hours from .9 to .95 inch ; color invariably 

 green, no matter what was the hue before the moult, the patch almost always 

 wholly suppressed, but occasionally traces of it can be seen in an indistinct salmon 

 spot on either side of dorsum. In five or six days is fully grown. 



Mature L.\rva. — Length, 1.5 to 1.8 inch; cylindrical; thickest at 4, 5, 

 sloping on back and sides to 13, and rapidly to 2 ; color, yellow-green, velvety, 

 shadinsT on the sides into whitish-green ; under side white ; legs and pro-legs 



